5.5.3 Heat protection mechanism
The BJ cartridge head’s aluminum panel becomes hot during printing. It also gets hot if
printing continues even after the ink in the cartridge has been depleted. The aluminum
panel’s temperature is detected by the BJ cartridge’s head temperature sensor.
•
When the carriage is to be moved to the cartridge replacement position, the following
applies:
If the detected temperature exceeds 50°C,
“WAIT COOLING”
is displayed and the
carriage does not move. This is to prevent the user from touching the BJ cartridge’s
aluminum panel. After several minutes when the temperature decreases, the cartridge
replacement procedure must be executed again.
•
When a temperature exceeding the standard temperature is detected, the following
applies:
During printing, the printing head temperature is monitored every 50 ms. If the printing
head temperature exceeds 75°C, a 3.5-second wait period is inserted after each printed
line for 20 seconds. This is to allow the printing head to cool. After 20 seconds, the
head temperature is checked. If the temperature has dropped below 75°C, normal
printing resumes without any wait period inserted. However, if the head temperature is
still above 75°C, the wait period is inserted after each printed line until the printing head
cools sufficiently.
If a head temperature exceeding 100°C is detected for 0.2 sec. during printing, it will be
deemed as a BJ head abnormal temperature error and
“CHECK PRINTER ##336”
will be
displayed. The printing operation will also stop.
If a head temperature exceeding 100°C is detected for 1 sec. during printing, it will be
deemed as a BJ head temperature sensor error and
“CHECK PRINTER ##337”
will be
displayed. The printing operation will also stop.
5.5.4 Overcurrent protection
The fax unit has an overcurrent protection circuit with a built-in fuse to prevent an abnormal
temperature increase if an overcurrent flows to the motors and power supply due to a driver
IC problem, software lockup, or short circuiting.
Protected Component
Safety Device
Document feed motor
IC protector (FU3) on PCNT board
Paper feed motor
IC protector (FU1) on PCNT board
Carriage motor
IC protector (FU2) on PCNT board
Power supply unit
Glass-tube current fuse (250V, 2.5A), overcurrent protection
circuit
Chapter 1: General Description
1-55
Summary of Contents for MultiPASS C50
Page 5: ...III REVISION HISTORY REVISION CONTENT 0 Original III ...
Page 16: ...XIV This page intentionally left blank ...
Page 17: ...Part 1 Facsimile ...
Page 18: ......
Page 19: ...Chapter 1 General Description ...
Page 20: ......
Page 71: ...Chapter 1 General Description 1 51 Waste Ink absorber Figure 1 23 Waste Ink Absorber ...
Page 78: ...Part 1 Facsimile 1 58 This page intentionally left blank ...
Page 79: ...Chapter 2 Technical Reference ...
Page 80: ......
Page 116: ...Part 1 Facsimile 2 36 This page intentionally left blank ...
Page 117: ...Chapter 3 Maintenance and Service ...
Page 118: ......
Page 143: ...Chapter 3 Maintenance Service 3 25 This page intentionally left blank ...
Page 175: ...Chapter 3 Maintenance Service 3 57 Figure 3 30 Print Pattern Sample ...
Page 189: ...a 2 System dump list Chapter 3 Maintenance Service 3 71 Figure 3 37 System Dump List 1 2 ...
Page 197: ...Chapter 4 Appendix ...
Page 198: ......
Page 216: ...Part 1 Facsimile 4 18 This page intentionally left blank ...
Page 221: ...Part 2 Printer ...
Page 222: ......
Page 223: ...Chapter 1 General Description ...
Page 224: ......
Page 238: ...Part 2 Printer 1 14 This page intentionally left blank ...
Page 239: ...Chapter 2 Technical Reference ...
Page 240: ......
Page 255: ...Chapter 3 Maintenance and Service ...
Page 256: ......
Page 265: ...Chapter 4 Appendix ...
Page 266: ......
Page 270: ...Part 2 Printer 4 4 This page intentionally left blank ...
Page 271: ...0298 SC 2 00 0 ...